Help What Is This Line For On My Rb25?

[blown07]

i've just noticed on the rb25det there are an extra line from the head running to the block. what could these be used for? & what do i do with it as the rb30 block doesn't have a tapped hole on the block to fit it...

here's a pic of the rb25det block with the line>>

& here's the rb30 block that doesn't have a tapped hole to fit the line>>

[SECURITY]

thats the VCT oil drain. if you're running VCT then you can "T" into the turbo oil drain. otherwise you can block it off if you arent running VCT.

[blown07]

oh ok i thought it may of been something like that. so when i block the VCT off in the head (weld or cap) & block that line off is there anything else i have to do involving the VCT or is that it?

cheers

Edited January 22, 2011 by blown07

[KiwiRS4T]

Keep the VCT

[blown07]

Keep the VCT

nar dont want to get the extra work done. there's no need anyways unless i'm running a set of cams i'm only running stock cams atm

[SECURITY]

It's not a huge job. There is a mod you can do to it to feed oil to it. It's all in the rb30 thread.

[blown07]

It's not a huge job. There is a mod you can do to it to feed oil to it. It's all in the rb30 thread.

yeah i know but i'd rather just block it off doesn't affect it not having it much does it?

[SECURITY]

as far as i know its not a huge deal, im not using one on my 25/30.

[Adriano]

If the motor is still apart, i would definately run the vct. It costs like $100 to keep it. Its not a gimmick, nissan designed it for stock cams

[R31Nismoid]

Keep the VCT, it is there for a purpose, it does off very good gains.

You'd be mad not to keep it IMO.

[NYTSKY]

Having seen the difference on the dyno with the VCT switch on and off, i would highly recommend you keep it. Especially with stock cams.

[Simon-S14]

if he is going aftermarket cams then no need for it really. nothing a good set of cams and adjustable gears and some dyno time wont fix in regard to any VCT losses.

question tho.. any reasons the neo's dont have VCT feeds on them? is it because they are solid lifters so less oil in head.

[Adriano]

I assume you mean drains, as the neo's do have the separate oil feed

[blown07]

ok so if i keep the VCT would i have to run another oil drain line from the front of the head like i've seen people on these threads do or just leave this for the drain line?

[MBS206]

That is an oil drain, and nothing to do with VCT. It's on the wrong cam to start with for VCT!

Keep it connected, get it fitted to run into the sump directly.

Get the VCT connected. HUGE benefits.

[JonnoHR31]

T that line into the turbo oil return.

theres a thread on here for an internal vct feed, if you already have the tools then its free to do and doesnt take long at all, very worth it.

[SECURITY]

dammit. im going to have to hook this up in my 30.

im going to do the internal VCT feed then widen my oil drains in the head. since the oil restrictors are in the block will that external oil drain make any real difference?

[Simon-S14]

I assume you mean drains, as the neo's do have the separate oil feed

oops i did mean drain but wrote feed lol.

but yeah.. interesting to see they dont run it. its just a blanked off area in the head.

[JonnoHR31]

its more a breather than a drain. the drains go down through the block

[blown07]

yeah i'm just going to T it into the turbo oil drain.

not keeping the VCT either, i'm guessing all i have to do is block the oil feed off in the head & thats it? anything else i have to do?

it wont stuff the head or anything blocking the VCT off will it???